Beetlecrab.audio Tempera (firmware 2.2) MIDI CC chart, NRPN and OSC map¶
The Beetlecrab.audio Tempera MIDI implementation: 104 CC, 4 SysEx commands, each named, for Claude (MCP), SuperCollider or any OSC app.
| Device | Beetlecrab.audio Tempera |
|---|---|
| Vendor | Beetlecrab.audio |
| OSC prefix | /tempera |
| Source | 📘 From the manufacturer's documentation |
| Firmware | 2.2 |
| Revision | firmware 2.2 (2026-01-14) |
| Upstream | vendor-doc |
| Driver file | devices/beetlecrab-audio/tempera.vendor.fw-2.2.json |
Not tested on the device yet
This driver comes from documentation or community data and has not been checked on real hardware. If you own one, a quick test and a pull request promoting it helps everyone — see CONTRIBUTING.
Other versions of the Beetlecrab.audio Tempera (2)
How do you control it?¶
Find the MIDI ports, then start the bridge with this driver:
osc-bridge detect # prints the ready-to-run line for what is plugged in
osc-bridge run --device devices/beetlecrab-audio/tempera.vendor.fw-2.2.json --out-port <N> --in-port <M>
Then send OSC to 127.0.0.1:7777, for example:
From Claude or any MCP client, the osc-bridge mcp server exposes this driver as tempera: ask “what can the Beetlecrab.audio Tempera do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (104)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/tempera/modwheel |
1 | 0–127 | continuous | Global | |
/tempera/emitters/active |
10 | 0–3 | continuous | Emitters — Global | |
/tempera/emitters/place |
11 | 0–63 | continuous | Emitters — Global | |
/tempera/emitters/remove |
12 | 0–64 | continuous | Emitters — Global | |
/tempera/adsr/attack |
13 | 0–127 | continuous | ADSR | |
/tempera/adsr/decay |
14 | 0–127 | continuous | ADSR | |
/tempera/adsr/sustain |
15 | 0–127 | continuous | ADSR | |
/tempera/adsr/release |
16 | 0–127 | continuous | ADSR | |
/tempera/reverb/size |
17 | 0–127 | continuous | Reverb | |
/tempera/reverb/color |
18 | 0–127 | continuous | Reverb | |
/tempera/reverb/mix |
19 | 0–127 | continuous | Reverb | |
/tempera/delay/feedback |
20 | 0–127 | continuous | Delay | |
/tempera/delay/time |
21 | 0–127 | continuous | Delay | |
/tempera/delay/color |
22 | 0–127 | continuous | Delay | |
/tempera/delay/mix |
23 | 0–127 | continuous | Delay | |
/tempera/filter/cutoff |
24 | 0–127 | continuous | Filter | |
/tempera/filter/resonance |
25 | 0–127 | continuous | Filter | |
/tempera/chorus/depth |
26 | 0–127 | continuous | Chorus | |
/tempera/chorus/speed |
27 | 0–127 | continuous | Chorus | |
/tempera/chorus/flange |
28 | 0–127 | continuous | Chorus | |
/tempera/chorus/mix |
29 | 0–127 | continuous | Chorus | |
/tempera/tracks/1/volume |
30 | 0–127 | continuous | Tracks | |
/tempera/tracks/2/volume |
31 | 0–127 | continuous | Tracks | |
/tempera/tracks/3/volume |
33 | 0–127 | continuous | Tracks | |
/tempera/tracks/4/volume |
34 | 0–127 | continuous | Tracks | |
/tempera/tracks/5/volume |
35 | 0–127 | continuous | Tracks | |
/tempera/tracks/6/volume |
36 | 0–127 | continuous | Tracks | |
/tempera/tracks/7/volume |
37 | 0–127 | continuous | Tracks | |
/tempera/tracks/8/volume |
39 | 0–127 | continuous | Tracks | |
/tempera/emitter_1/volume |
40 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_length_cell |
41 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_length_note |
42 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_density |
43 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_shape |
44 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_shape_attack |
45 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_pan |
46 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/grain_tune_spread |
47 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/octave |
48 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/relative_x |
49 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/relative_y |
50 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/spray_x |
51 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/spray_y |
52 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/tone_filter_width |
53 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/tone_filter_center |
54 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_1/effects_send |
55 | 0–127 | continuous | Emitter 1 | |
/tempera/emitter_2/volume |
56 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_length_cell |
57 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_length_note |
58 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_density |
59 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_shape |
60 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_shape_attack |
61 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_pan |
62 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/grain_tune_spread |
63 | 0–127 | continuous | Emitter 2 | |
/tempera/damper |
64 | 0–127 | continuous | Global | |
/tempera/emitter_2/octave |
65 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/relative_x |
67 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/relative_y |
68 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/spray_x |
69 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/spray_y |
70 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/tone_filter_width |
72 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/tone_filter_center |
73 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_2/effects_send |
75 | 0–127 | continuous | Emitter 2 | |
/tempera/emitter_3/volume |
76 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_length_cell |
77 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_length_note |
78 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_density |
79 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_shape |
80 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_shape_attack |
81 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_pan |
82 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/grain_tune_spread |
83 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/octave |
84 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/relative_x |
85 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/relative_y |
86 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/spray_x |
87 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/spray_y |
88 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/tone_filter_width |
89 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/tone_filter_center |
90 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_3/effects_send |
91 | 0–127 | continuous | Emitter 3 | |
/tempera/emitter_4/volume |
92 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_length_cell |
93 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_length_note |
94 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_density |
95 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_shape |
96 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_shape_attack |
97 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_pan |
98 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/grain_tune_spread |
99 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/octave |
102 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/relative_x |
103 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/relative_y |
104 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/spray_x |
105 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/spray_y |
106 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/tone_filter_width |
107 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/tone_filter_center |
108 | 0–127 | continuous | Emitter 4 | |
/tempera/emitter_4/effects_send |
109 | 0–127 | continuous | Emitter 4 | |
/tempera/modulators/1/size |
110 | 0–127 | continuous | Modulators | |
/tempera/modulators/2/size |
111 | 0–127 | continuous | Modulators | |
/tempera/modulators/3/size |
112 | 0–127 | continuous | Modulators | |
/tempera/modulators/4/size |
113 | 0–127 | continuous | Modulators | |
/tempera/modulators/5/size |
114 | 0–127 | continuous | Modulators | |
/tempera/modulators/6/size |
115 | 0–127 | continuous | Modulators | |
/tempera/modulators/7/size |
116 | 0–127 | continuous | Modulators | |
/tempera/modulators/8/size |
117 | 0–127 | continuous | Modulators | |
/tempera/modulators/9/size |
118 | 0–127 | continuous | Modulators | |
/tempera/modulators/10/size |
119 | 0–127 | continuous | Modulators |
SysEx commands (4)¶
| OSC address | Arguments |
|---|---|
/tempera/canvas/load |
program: u7 |
/tempera/emitters/place_by_cell |
note: u7, velocity: u7 |
/tempera/emitters/select_active_by_note |
note: u7 |
/tempera/tracks/arm |
note: u7 |
Limitations¶
CC and Note/PC only, as documented by the vendor. The vendor doc does not expose NRPN or SysEx parameters; preset management and bulk dump are not covered. To extend, sniff the device or wait for an updated implementation chart.
Frequently asked questions¶
Which MIDI CC controls the filter cutoff on the Beetlecrab.audio Tempera?
CC 24 (0–127), named /tempera/filter/cutoff in SynthHub's map.
How many parameters of the Beetlecrab.audio Tempera can be controlled over MIDI?
SynthHub's map of the Beetlecrab.audio Tempera lists 104 MIDI CC parameters, each with its number, range and a readable name; the full chart is on this page.
Can an AI agent like Claude control the Beetlecrab.audio Tempera?
Yes: SynthHub's hosted MCP server knows the Beetlecrab.audio Tempera's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.